The Belgian Bearded d'Uccle (pronounced dew-clay), or Barbu D'Uccle in French, is a breed of bantam chicken originating from the town of Uccle on the outskirts of Brussels, Belgium. The bird is frequently referred to as the Mille Fleur in the U.S., after the most common color variation (which is French for "thousand flowers")

The breed came into being in the early 19th Century from Belgium, and was created by a Belgian man by the name of Michael Van Gelder. Most sources maintain that it originated from crosses of the Antwerp Belgian and the Sabelpoot which is known today as the Booted Bantam, and raised as a closely related but separated breed.

A very friendly and curious breed the D'Uccle makes a fabulous family pet suitable for backyards and small acreages.